Ian

@GillWard Welcome to the lithium side! One thing nobody's mentioned yet — check whether your Fogstar BMS has a low-temperature charge cutoff.

@VanBarry good timing on this thread — I've been keeping notes on mine for a few months now. Running a Multiplus-II 48/3000 here and in proper search mode I'm typically seeing around 11-15W at the...

Been having a strange one with my 280Ah LiFePO4 pack (8 cells in 24v configuration) that I built up last autumn.

Ian1968 | 847 posts @NeilJackson Snap! I did exactly the same about two years ago. Mine's a 300W panel into a Victron 100/20 feeding a 100Ah lithium, and honestly it was the right call.

Picked up a JK BMS (the 200A active balancer version) back in January to run with four 280Ah EVE cells I got from Docan.

We've got a little 20m² timber cabin in the Welsh borders that we use as a weekend retreat and occasional longer stays.

Ian1968 | 412 posts @DontPanic8 Nice one! That's a cracking price for a 24kWh pack. One thing I'd flag that nobody's mentioned yet - make sure you've got proper thermal management sorted before...

Good points from @GemmaWood and @JasonEdwards already. One thing I'd add - in non-isolated mode with lithium on the output side, make sure your absorption and float voltages are properly dialled...

Ian1968 | 312 posts | ☀️ Solar Enthusiast Been running this exact setup on my off-grid cabin for about 18 months now — Pi 4 with Venus OS and it's rock solid.

@GafferTapeKing worth checking your battery capacity setting in VE.Configure – if it's set too low, the MultiPlus calculates charge current relative to that figure and can trigger the float...